This a mirror of WSJT-X and will be updated every 6 hours. PR will be ignored, head to the SF link. Repo will be updated at 06:00:00 UTC 12:00:00 UTC 18:00:00 UTC 00:00:00 UTC Now fixed.
__ __ ______ _____ ________ __ __ | \ _ | \ / \ | \| \ | \ | \ | $$ / \ | $$| $$$$$$\ \$$$$$ \$$$$$$$$ | $$ | $$ | $$/ $\| $$| $$___\$$ | $$ | $$ ______ \$$\/ $$ | $$ $$$\ $$ \$$ \ __ | $$ | $$| \ >$$ $$ | $$ $$\$$\$$ _\$$$$$$\| \ | $$ | $$ \$$$$$$/ $$$$\ | $$$$ \$$$$| \__| $$| $$__| $$ | $$ | $$ \$$\ | $$$ \$$$ \$$ $$ \$$ $$ | $$ | $$ | $$ \$$ \$$ \$$$$$$ \$$$$$$ \$$ \$$ \$$ Copyright (C) 2001 - 2021 by Joe Taylor, K1JT. WSJT-X Version 2.5 offers eleven different protocols or modes: FT4, FT8, JT4, JT9, JT65, Q65, FST4, MSK144, WSPR, FST4W, and Echo. The first seven are designed for making reliable QSOs under weak-signal conditions. They use nearly identical message structure and source encoding. JT65 and Q65 were designed for EME (“moonbounce”), but not limited to just that propagation path, on the VHF/UHF bands and JT65 has also proven very effective for worldwide QRP communication on the HF bands. Q65 has a number of advantages over JT65, including better performance on the very weakest signals and variants with different T/R period lengths. We imagine that over time it may replace JT65 for EME use, it has also proved to be very effective for iono-scatter paths on 6m. JT9 was originally designed for the LF, MF, and lower HF bands. Its submode JT9A is 2 dB more sensitive than JT65 while using less than 10% of the bandwidth. JT4 offers a wide variety of tone spacings and has proven highly effective for EME on microwave bands up to 24 GHz. These four “slow” modes use one-minute timed sequences of alternating transmission and reception, so a minimal QSO takes four to six minutes — two or three transmissions by each station, one sending in odd UTC minutes and the other even. FT8 is operationally similar but four times faster (15-second T/R sequences) and less sensitive by a few dB. FT4 is faster still (7.5 s T/R sequences) and especially well suited for radio contesting. On the HF bands, world-wide QSOs are possible with any of these modes using power levels of a few watts (or even milliwatts) and compromise antennas. QSOs are possible at signal levels 10 to 15 dB below those required for CW. FST4 has similarities in use to JT9 but offers more flexibility as it offers different period lengths allowing QSO completion time to be traded off against sensitivity. In its base form of FST4-60A it has better sensitivity than JT9A and should be considered as an upgrade where JT9 has been the preferred slow QSO mode. Note that even though their T/R sequences are short, FT4 and FT8 are classified as slow modes because their message frames are sent only once per transmission. All fast modes in WSJT-X send their message frames repeatedly, as many times as will fit into the Tx sequence length. MSK144, and optionally submodes JT9E-H are “fast” protocols designed to take advantage of brief signal enhancements from ionized meteor trails, aircraft scatter, and other types of scatter propagation. These modes use timed sequences of 5, 10, 15, or 30 s duration. User messages are transmitted repeatedly at high rate (up to 250 characters per second, for MSK144) to make good use of the shortest meteor-trail reflections or “pings”. MSK144 uses the same structured messages as the slow modes and optionally an abbreviated format with hashed callsigns. WSPR (pronounced “whisper”) stands for Weak Signal Propagation Reporter. The WSPR protocol was designed for probing potential propagation paths using low-power transmissions. WSPR messages normally carry the transmitting station’s callsign, grid locator, and transmitter power in dBm, and they can be decoded at signal-to-noise ratios as low as -31 dB in a 2500 Hz bandwidth. WSPR users with internet access can automatically upload reception reports to a central database called WSPRnet that provides a mapping facility, archival storage, and many other features. FST4W, like WSPR, is a quasi-beacon mode, it targets LF and MF bands and offers a number of T/R periods form 2 minutes up to 30 minutes for the most challenging weak signal paths. Similarly to WSPR reception reports can be automatically uploaded to the WSPRnet.org web service. Echo mode allows you to detect and measure your own station’s echoes from the moon, even if they are far below the audible threshold. WSJT-X provides spectral displays for receiver passbands as wide as 5 kHz, flexible rig control for nearly all modern radios used by amateurs, and a wide variety of special aids such as automatic Doppler tracking for EME QSOs and Echo testing. The program runs equally well on Windows, Macintosh, and Linux systems, and installation packages are available for all three platforms. WSJT-X is an open-source project released under the GPLv3 license (See COPYING). If you have programming or documentation skills or would like to contribute to the project in other ways, please make your interests known to the development team. The project’s source-code repositories can be found at https://sourceforge.net/p/wsjt/wsjtx/ci/master/tree/, and communication among the developers takes place on the email reflector https://sourceforge.net/p/wsjt/mailman. User-level questions and answers, and general communication among users is found on the https://wsjtx.groups.io/g/main email reflector. Project web site: https://www.physics.princeton.edu/pulsar/K1JT/wsjtx.html Project mailing list (shared with other applications from the same team): https://sourceforge.net/projects/wsjt/lists/wsjt-devel